BUSINESS ADMINISTRATION
RESEARCH METHODOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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z-score = raw score-mean
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z-score = mean-raw score / standard deviation
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z-score = raw score-mean / standard deviation
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z-score = mean / raw score * standard deviation
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Detailed explanation-1: -How do you calculate the z-score? The formula for calculating a z-score is is z = (x-)/, where x is the raw score, is the population mean, and is the population standard deviation. As the formula shows, the z-score is simply the raw score minus the population mean, divided by the population standard deviation.
Detailed explanation-2: -Using the z score, as well as the mean and the standard deviation, we can compute the raw score value by the formula, x= µ + Z, where µ equals the mean, Z equals the z score, and equals the standard deviation.
Detailed explanation-3: -The Z-score, or standard score, is the number of standard deviations a given data point lies above or below mean. Standard deviation is essentially a reflection of the amount of variability within a given data set.